A Study on the Reduction of Chlorinated Organics in Bleach Plant Effluent by Oxidation with Oxygen

The removal of chlorinated organics from the E, effluent by oxygen oxidation treatment was studied. It was found that the reduction of TOCI and colour from the fraction of highmolecular-weight chlorolignins is vitally important to the overall reduction of TOCI and colour from the El effluent. Three pathways are potentially involved in the removal of TOCI and colour from the E, effluent: degradation, oxidation, and the hydrolytic splitting of chlorine from chlorolignins. The removal of the TOCl and colour occurred mainly in the early stages of the treatment; the same was true for the degradation of the chlorolignins. Lo w-molecularweight compounds may be formed due to degradation of the chlorolignin, and these can be further degraded by the treament.